Excavating tooth



April 5, 1938. E. YOUNlE 3,

EXCAVATING TOOTH I Filed July 10, 1937' 3 Sheets-Sheet 1 32 Zed/e15 E oazzaz'e April 5, 1938. E. YOUNIE 2,113,420

EXCAVATING TOOTH Filed July 10, 1937 3 Sheets-Sheet 2 L. E. YOUNIE EXCAVATING TOOTH April 5, 1938.

Filed July 10, 1957 5 Shee'ts-Sheet 3 Patented Apr. 5, 1938 EXOAVATING 'roo'm Lewis ErYounie, Portland, reg., asm; to

Electric Steel Foundry Company; Portla'ndy. 0reg., a corporation of Oregon Application July 10, 1537, Serial No. "153,03:

lIClalms. (Cl. 37-141 This invention relates to excavating teeth provided at the mouth of an earth digging power shovel or drag line bucket, and is more particularly concerned-with the provision of means for removably connecting such teeth to the front of such a shovel or bucket.

Excavating teeth are subjected to heavy shocks, especially when operating in rocky soil. Occasionally the connecting means between a bucket and one of these teeth becomes broken. It is, therefore, highly desirable to provide a connection between bucket and tooth such that the breakage may be easily repaired, on the job, with the least possible loss in material and time. 6

With the above in view, it is a salient object of my invention to provide a strong, rigid connection, between a tooth and an excavating bucket, that is inexpensive and easily and quickly replaceable if broken.

In the accompanying drawings, in which like numerals designate like parts throughout the same:

Fig. 1 is a right front perspective view of a dipper front embodying the invention;

Fig. 2 is a right front perspective view, of a fraction of the dipper front illustrated in Fig. 1, showing one of theteeth in greater detail.

Fig. 3 is an exploded view of the device shown assembled in Fig. 2.

Fig. 4 is a longitudinal vertical sectional view taken in. the direction of the arrows along the line 4-4 of Fig. 2.

Fig. 5 is a view of the back of the tooth taken in the direction of the arrows along the line 6-6 of Fig. 4 with the double conical plug and key removed therefrom.

Fig. 6.is an exploded view showing a modified form of the tooth and dipper front.

Fig. 7 is a longitudinal vertical section through the tooth and dipper front shown in Fig. 6 when in assembled position.

Referring to Figs. 1, 2, 3, 4, and 5 of the drawings, a dipper front It is provided on its forward cuttingv edge with a plurality, in this instance 46- four, of thickened sections l2 containing forwardly opening conical sockets l4. Each socket l4 contains one end of a double frusto-conical plug l6 rigidly secured thereto by a tapered key It driven into aligned key slots 20 and 22 located respectively in the thickened section l2 and the plug ii. 'A tooth base 24 is provided on its rear side with a conical socket", similar to the sock et l4, which is slid over the exposed end of the 'plug l6 and secured in place by means of a a tapered key 24 driven into aligned key slots III and a2 1.. thetooth base 24 and theplug l6 respectively. In the above'asse'mbled position, a

tang extending rearwardly from the upper portion of the tooth base 24 is engaged in a notch 36 formed in the section l2 above the conical g socket l4.

It will thus be seen that'the keys I6 and 26 wedge the section l2 in the dipper front "I and the tooth base'24tightly against the surface of the plug l6 with the tang 34 engaged in the notch 10 36, thereby forming a very solid structure.

- The cooperatingt'ang 34 and notch 46 prevent relativerotation between the parts l2, l6, and 24 and thus relieve the keys I! and 26 of the shearing stresses that might otherwise cause a fail- I ure of these parts.

The tooth base 24 isprovided with two forwardly opening slots 34 and "intowhich are slid two fingers '42 and 44 of a removable cutting bit 46 which is held in place by a tapered key 44 m driven transversely through an alignedv slot and notches 52 formed in the tooth base 24 and fingers 42 and 44 respectively.

If it is desired to give added support to the thickened sections l2 and the tooth bases 24, the g5 front edge of the dipper front "I may be provided with flanges 66, which extend forwardly I along each side of the thickened sections 12 and somewhat therebeyond to form wings 64 which support thertooth base 24 against lateral move- 30 ment.. I

In the embodiment illustrated in Figs. 6 and '7, the dipper front is shown provided with a thickened section 66 which differs from the section I2 only in that no notch 36 is provided in 35 its forward face. This section 60 is laterally braced by flanges 62, similar to flanges 66 excepting that they do not extend beyond the forward face of the thickened section as do the flanges 56. A conical recess 64 in the-section til 40 securesone end of a double frusto-conical plug 66 by means of a tapered key lfa'nd aligned key slots 10 and 12 in the same manner that the plug I6 is secured-in the recess l4. The projecting end of the plug 66 is fitted to a conical recess 14 45 in the rear of a wedge shaped cutting point I6 and the two are rigidly secured together by a tapered key It driven through aligned key slots and 62 formed in the point 16 and plug 66 respectively.

Thus the device shown in Figs. 6 and 'l is much like that illustrated inFlgs. 1, 2, 3, 4, and 5, excepting that the point 16 is a single piece instead of being a composite structure, no notch 36 and tang 34 connection is provided, and the webs or 66 vention the weakest part of the connection between the teeth 24 or 18 and the dipper front is theplug II or I, or the keys I! and II or I. and II.

will break one of the. above relatively simple'parts which may be easily and inexpensively replaced The word "bucket" in the claims-is used inits broad sense and is generic as to buckets, dinners and shovels used on various types of power excavating machinu.

While I have shown specific embodiments, it

is to be understood that thisinvention may assume various forms, and that the scope of my invention is to be limited 'only by the following claims.

I claim:

1. A connection for securing an excavating tooth to a bucket comprising in combination, a bucket cutting edge having a conical socket therein, a double frusto-conical plug removably secured in said socket at one end. an excavating tooth having a conical socket to lit the other end of said plug, and means to removably secure the tooth to said other end of said plug.

tooth to a bucket comprising in combination, a-

bucket cutting edge having a conical socket therein. an excavating tooth having a conical socket therein, a double frusto-conicai plug to ilt both said conical sockets with its oppodte ends, and tapered keys to secure said tooth and said bucket-to said plug. i

4. A connection for securing an excavating tooth to a bucket comprising in combination, a bucket cutting edge having a conical socket there- Thus, any unusual stresson the teeth in,aneacavating toothlnvingaconicaisocket thesumadoubleiruIto-conical Pill! saidoonieallocketswithits opposite eredkeystosecuresaidtoothandsald to saidplug, and tongue and notch preventrelative rotationbetweensaid dlpperand saidtooth.

erein.anexcavatingtoothhavlnga socket therein. a double tapered plug to saidlocketswlthits opposite ends, tosecuresaidplugtosaidtoothandsaidbucket. 6.A connection forsecuringanexcavating tooth to a bucket comprising in combination, a bucket cutting edge having a tapered therein, an excavating toothhavlng a'taperod tosecure saldplugtosaid toothandsaid bucket.

8. A connection for securing an excavating tooth to a bucket comprising in combination, a bucket cutting edge having a tapered socket therein, an excavating tooth having a tapered socket therein. a double tapered plug to iit both said sockets with its opposite ends, means to secure said plug to said tooth and said bucket, and webs extending iromsaid bucket cutting edge to support the sides or said tooth.

9. A connection for securing an excavating tooth to a bucket comprising, in combination. a bucket cutting cue having a tapered socket therein. an excavating tooth having a tapered socket therein, a double tapered plug to ilt both said sockets with its opposite ends. means to secure said plug t said tooth and said bucket. webs extending from said bucket cutting edge to support the sides oi said tooth. and interlocking tongue and notch means to prevent relative rotation between the tooth and bucket.

10. A connection for securing an excavating toothto a bucket comprising, in combination, a dipper front having a tapered socket therein, an excavating tooth having a socket therein, a plug to flt both said sockets with its opposite ends. and means to secure said plug to said tooth and said bucket.

ii. A connection for tooth to a bucket securing an excavating a bucket comprising, in combination. cutting edge having a socket therein,

an excavating tooth having a tapered socket therein, a plug to flt both said sockets with its opposite ends. and means to secure said plug to said tooth'and said bucket.

LEWIS E. YOUm. 

